Following a U.S. Department of Transportation call to require vehicle-to-vehicle communication technology for all cars and light trucks on the nation’s highways, the Virginia Tech Transportation Institute has been tapped to design the delivery framework that will allow vehicles to “talk” with their drivers and with other automobiles on the roadway.

The National Highway Traffic Safety Administration has awarded a $1 million grant in addition to a $3 million award given earlier for a project underway at the institute..

The goal is to design and test how motorists receive communications while driving, such as traffic warnings, the too-close approach of another vehicle and weather warnings. The focus is on the communication’s format, visual or audible, and the order and timing of such messages.

“We see this as a hugely progressive move. Vehicle communication technology has the great ability to improve safety, if it is implemented in a wise and safe way,” said Zac Doerzaph, director of the institute’s Center for Advanced Automotive Research and lead investigator on the project. “We’re trying to get ahead of the game to ensure design before connectivity proliferates the entire driving experience.”

The integration framework project builds on the institute’s already $30 million and growing funded projects related to connected-vehicle communication technology, including long-term research into crash avoidance systems, automated driving, and naturalistic driver experiences behind the wheel.

The institute, in coordination with the Virginia Department of Transportation, has a $14 million connected-vehicle test bed along Interstates 66 and 495 near Fairfax, Va., that contains 43 wireless infrastructure devices installed along roadways, all communicating with dozens of cars, trucks, and motorcycles equipped with wireless communication systems. The test bed will soon expand to include 80 roadside devices.

Doerzaph and his team for several years have been testing various methods for drivers to receive key information in a wise, safe, and timely manner, without causing distraction or overwhelming the motorist with myriad details, such as non-emergency weather reports during high-congestion traffic.

Tests already have been done on driver interfaces such as augmented reality pop-ups on windshields or audible devices, both in simulated labs and on open highways, with motorists communicating with the car by voice or by gesture, such as “sweeping” away information on a screen with the wave of a hand.

“We want to coordinate the surge of information,” said Doerzaph, adding that the coming changes to how motorists interact with connected vehicles can be likened to the way the Internet changed how users interact with desktop computers. The key is to contain vital information fast, accurately, and as required.

Doerzaph says the framework being designed and subsequently documented as a set of design principles will serve as a reference guide by designers of apps and driver systems for connected automobile and related wireless devices, with driver safety and ease of use as a focus.

VTTI says the challenges in implementing vehicle communication systems are numerous, from creating uniform warnings and data formats across varying handheld devices and vehicles, to sorting vital information from traffic officials that may be only for truck drivers and not passenger-car motorists, and stacking warnings and communications in order of importance. Also vital is securing communication networks from hacking.

In its Feb. 3 announcement seen as a mandate for connected-vehicle use, U.S. Transportation Secretary Anthony Foxx said, “Vehicle-to-vehicle technology represents the next generation of auto safety improvements, building on the life-saving achievements we’ve already seen with safety belts and air bags. By helping drivers avoid crashes, this technology will play a key role in improving the way people get where they need to go while ensuring that the U.S. remains the leader in the global automotive industry.”

Several federally funded connected-vehicle research test beds are operating throughout the United States.